h2 {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0.7;
}

#graph {
    display: flex;
    justify-content: center;
    align-items: center;
}

.node-label {
    font-size: 12px;
    padding: 1px 4px;
    border-radius: 4px;
    background-color: rgba(0, 0, 0, 0.5);
    user-select: none;
}